Attending poker school is similar to attending any other school. In general it is quicker somebody to explain you the basics than to figure it out yourself but this is just the general principle. Poker is though a very dynamic and relatively fast changing game so what worked for somebody in the past is not guaranteed to work today for you. This is especially valid for more advanced techniques.
For me the best way to learn is to try first to learn the real basic things like position, opening ranges, pot
odds and such till you manage to be successful at micro stakes and after that expand your knowledge with more advanced techniques by reading books, watching videos, test them in live game and adapt them to your own game. This way gradually you will build your own and effective style.
If you decide to pay to a poker school to teach you the basics look at their reputation, price and whatever information you can get for them before giving them your money. If an offer looks too good and there is no solid enough feedback to confirm it most probably it is a scam. Due to the big amount of people who think that poker is source of easy money there will always be enough people trying to steal their money by offering "magic" courses.
I personally prefer to look for information myself than to pay somebody to teach me but it is a matter of personal choice.